Stamping machine



y 1931- E. H. TRUMP 1,807,499

STAMPING MACHINE Filed April 3. 1 928 v 5 Sheets-Sheet 1 ATTORNEY a I INVENTOR Q I fly/7am; v BY May 26, 1931. v TRUMP 1,807,499

STAMPING MACHINE May 26, 1931. E. H. TRUMP I 1,807,499

' STAMPING MACHINE Filgd April 5, 1928 5 Sheets-Sheet s ATTORNEY May 26, 1931.

E. H. TRUMP STAMPING MACHINE Filed April 3, 1928 5 Sheets-Sheet 4 a 7 5 v 5 1 5 /6 8 9 a 5 42 w a a. 1 5 w, 4 M30 3 w? =1 7 r w .4 fi 7 INVENTOR Warm a.

ATTORNEY May 26, 1931. E. H; TRUMP STAMPING MACHINE 5 Sheets-Sheet 5 Filed April 3, 1928 INVENTOR Z12 77w;

BY ATTORNEY Patented May 26, 1931 PATENT OFFICE ELNO n. 'rrwmr, or AKRON, onro ermine mcmim Application flied April 3,

- My invention relates to stamping machines and more particularly to a machine for stamping rubber articles such as automobile I floor mats.

sheet of rubber or other suitable material with the diewhich moves with the die during each stamping operation to eliminate retardation or mutilation to the endless conveyor belt u on which the rubber sheet is earned.

Wit the preceding and other objects and advantages in mind, the invention consists in the novel combination of elements, constructions and arrangement of parts to be hereinafter specifically referred to,'claimed and illustrated in the accompanying drawings, wherein:

. igure 1 is a "side elevation of the invention;

30 Figure 2 is a longitudinal sectional view of the same; 1

Figure 3 is an enlarged fragmentary sectional view taken on line 3--3 of Figure 2;

Figure 4: is a top plan view;

Figure 5 is a fragmentary longitudinal sectional view of the machine and illustratin the'stamping die in elevated position;

%i re 6 is a similar view and illustratembodied in the invention.

and expeditiously stamped ing t 'e stampingdie and coacting base plate 1928. Serial No. 267,001.

Fig 1 is a detail' of a variable speed transmission. Referring to the invention in detail a hor izontally dis osed table comprising a main rectangular rame 5, supported from legs 6, parallel side members 7 attached to one end of the frame and supported at their outer ends by legs 8, is provided. Attached to and extending forwardly from the upper ends of the legs 6, at the forward end of the main frame, is a pair of inclined angle rails 9 which are attached to the lower end of the frame of a conventional calendar 10 from which sheet rubber is conveyed by means of an endless conveyor belt 11.

As illustrated in Figure 2 the conveyor belt 11 is trained over rollers 12 and 13, journalled at the ends of the rails 9, and over a main drive roller 14 supported in the outer ends of the side members for longitudinal adjustment in adjustable bearings 15. I The lower stretch of the belt extends beneath the table and passes over a suspension roll 16 journalled in the forward leg 6. To retain the conveyor belt against sagging as it passes over vthe table, a plurality of'parallel rollers 17 with which the belt contacts is journalled in the angle rails 9 and side members 7, respectively. It will be observed from the description thus far iven that the rubber sheet S, formed and fed from the calender, is picked up by the conveyor belt 11 adjacent the lower ends of the angle rails and conveyed longitudinally of the table.

For the purpose of stamping articles from the rubber sheet, such as automobile floor board 'mats, a continuously operated die is provided. This die is mounted in upstanding'parallel plates 18, secured to the upper .face ofthe frame 5 by-fastenings 19, and extending parallel to the side members 7. A base'plate 20 resting on horizontally disposed'parallel rollers 21 extending transversely of the frame and journalled therein, is slidable longitudinally of the frame. A relatively flat die head 22 is mounted between the plates 18 and above the base plate 20 for cooperation therewith in stamping articles from the sheet S as it is advanced over the base plate. Thedie head may be sired. A suitable pattern-plate 23 is detachably carried upon the under face of the die head, and for this purposethe die head is formed with U-shaped'guide flanges 24 at 1 its opposite longitudinal edges for the reception of outstanding marginal flanges 25 on the pattern plate. (See Fig. 3.) Removable fastenings 26',engage the die head and pattern plate to hold the latter against longitudinal movement relative to the die head.

To impart a translatory motion to the die head, pairs of transversely alined gears 26 fixed to stub shafts -27 journalled in the upstanding plates 18 are provided. These gears are counter-weighted as at 28 and are provided with hearing openings 29 at points diametrically opposite the counter-weights 28. Rectangular bars 30 extend transversely of thedie head adjacent-its opposite ends and are seated in parallel grooves 31 extending entirely across the upper face of the die head. U-shaped straps 32 embrace the bars at spaced intervals and are secured to the die head by removable fastenings 33. These bars terminate in laterally projecting trunnion's 34which are loosely received in the bearing openings 29 to eccentrically connect the bars to the pairs of coinciding gears 26. To rotate the gears 26 a drive gear 35 is journalled upon each of the upstanding plates 18 between the adjacent gears 26, and meshes with the latter as particularly illustrated in Figure 2. To drive the gears 35 a counter shaft 36, extending transversely of the table below the gears 35 and offset therefrom, is journalled 1n the frame 5, the shaft- 36 carrying spur gears 37 adjacent its ends which mesh with lar er gears 38 loose on one of the rollers 21. T ese gears 38 mesh with the gears 35 and rotate the latter in a clock-. Wise direction. Incident to the clockwise rotation of the drive gears 35, the counter-balanced gears will be rotated in a counter-clockwise direction and hence impart a translatory motion to the die head. I

When the die head is resting u on the sheet material and base plate to arm the stamping operation, it follows t at the baseplate must shift forwardly with the die head. Therefore the base plate is arranged for 1ongitudinal movement on the rollers 21, as above stated. To return the base plate to' normal position subsequent to each longitudinal movement by the die head, divergent contractile springs 39 are anchored to hooks 40 depending from one end of the base plate and are connected to a single spring 41- anchored to the frame 5. It will be observed that each time the base plate is advanced the contractile springs are tensioned to return the base plate to normal position as the die head ascends.

Cooperating with the counter-weighted gears 26 in lifting the die head after each stamping operation is a weight 42 which is vertically movable in a rectangular casing or guide 43 arranged to one side of the frame 5. (See Figs. 1 and 7.) The weight 42 is operatively connected with the die head by means of a shaft 44 extendin frame 5 and journalle in bearings'45 cast with an upper bracing structure 46 which bridges the frame 5 and integrally connects the upper ends of the lates 18. Flexible elements 47 are attached to pulleys 48 fixed to the shaft 44 at points above the die plate and weight 42, respectively. One of these flexible elements is attached to an eye 49 pro jecting vertically from the center of the die head, while the other flexible element is attached to the Weight42.

For the purpose of causing the conveyor belt 11 and die head 22 to move in synchronism a variable speed transmission 50 is pro vided, the latter being supported from the side members 7 as particularly illustrated in.

transversely of the equipped with friction cones 53 operatively connected together by a drive belt 54. At its outer end the shaft 52. carries a pair of sprocket wheels 55 and 550, one of which is operatively engaged a sprocket chain 56 passing around a sproc' of the roller 14.

A main power shaft 58 extends transversely beneath the table between the calender and frame 5 and is journalled in bearings 59. The drive shaft 58 carries at one end a sprocket gear 58a which is engaged by a drive c ain 60 engaged with a sprocket wheel 60' fixed to one of the'calender rolls. The opposite end of shaft 58 carries a sprocket wheel 57 a engaged by a sprocket chain 62 which is also. engaged witlrthe sprocket wheel 55a on theshaft 52 and by means of which shafts 51 and 52 are driven. n

Power is transmitted from the shaft 51 to the counter shaft 36 by means of a sprocket chain 63 engaged with a. sprocket wheel 64 fixed to-this shaft-51 and with a sprocket wheel 65 normally rotatable withthe counter shaft. The sprocket wheel 65' is arranged between coacting friction clutch disks 65 and 66 which are keyed to the counter shaft by keys 67a. The disk 65 abuts an annular shoulder 68 formed on the counter shaft, while the disk 66 is held yieldably engaged with sprocket 65 by a coiled expansion spring 69 arranged between disk 66'and a follower 70 keyed to shaft 36. This spring also urges follower 70 longitudinally into engagement with the hand wheel 73. The annulus or follower 70 is adjustable longitudinal} to regulate the degree the clutch disks engage the sprocket wheel 65 by means of the wheel 70 having a hub 71 et 57 fixed to one end of-friction with w 'ch' threaded upon the threaded end 72 of the 39 counter shaft.- By the provision of the loosely mounted sprocket wheel 65 the die head and endless belt will be actuated in synchronism. That is to say, the'endless belt and die head will travel at the same speed while the die head is pressing against the belt.

The slip clutch shown in detail in Fig. 10 takes care of the difference in travel between the cutting head and the conveyor belt and the return of the cutting head is either .speeded up or slowed down according to the shown.

In Figures 8 and 9 a modification of the invention is disclosed. Thismodification is an adaptation of the stamping machine as a textile fabric cutter. The die late 23 carries a diagonally disposed knife lade 78 for severing a longitudinal .sheet of textile fabric T such as is used in tire construction, on a bias. Instead of running the endless conveyor belt over the base plateas above set forth, it is, in this instance, passed between the rollers 21 and-the base plate, while the fabric sheet passes over the upper face of the base plate where it is cut into diagonal strips as it is advanced, by the cutting knife.

In the operation of the machine, power being applied to the power shaft, the endless conveyor belt is riven in a longitudinal direction to feed the sheet S to the moving die head. The conveyor belt and die head being timed to move in synchronism by means of the variable s eed transmission 50, a mator other fiat articleis stamped from the sheet each time the die head approaches the base plate; During each stamping Op-z eration the die head shifts longitudinally with the conveyor belt and sheet S. Incident to the longitudinal shifting of the die head the base plate is moved longitudinall on the rollers 21, tensioningthe contracti e springs. As the die head begins to ascend,-

preparatory to the next stamping operation, the base plate is returned to normal position by the contractile springs. Should the conveyor belt or die head for any reason tend to move at difi'erent speeds, they will be caused to move in unison by means of the coacting friction clutch disks and loosely mounted sprocket wheel on the counter shaft.

What is claimed is 1. In a stamping machine, a horizontal support over-which sheet material is fed,

pairs of coinciding transversely alined rotatable elements arranged above the support, and a die eccentrically supported adjacent its ends from the coinciding rotatable elements.-

2. In a stamping machine, a horizontal support over which sheet material is fed, pairs of coinciding transversely alined rotatable elements arranged above the support,

and a die eccentrically supported adjacent its ends from the coinciding rotatable elements, and a longitudinally shiftable base plate cooperating with the die in stamping articles from the sheet material. 3. In combination a horizontal roller mech anism for supporting advancing sheet material, adie element mounted for translatory movement and adapted to stamp articles from the sheet material as it is advanced,

means for operating said die element, a base plate cooperating with the die element and movable horizontally therewith while said element is in contact with the sheet material, and means to return said base plate to initial position.

4. In combination a horizontal support over which sheet material is advanced,atrans- I latory movable die element operating to stamp articles from'the sheet material as it is advanced, a base plate cooperating with thefclie element and movable horizontally tact with the sheet material, and means normally urging the base plate in a directionopposite the direction of travel of the. sheet material.

'5. In combination a longitudinally shiftable base normally urged in one direction and over which sheet material is advanced,-and a die mounted for translatory movement above the baseand causing the base to shift in as therewith while the die element is in com: Y

the direction of travel of the sheet material While the die is engaged with the latter.

6. In combination a longitudinally shiftable base plate normally urged in one direction, a conveyor movable over the base plate for feeding sheet material in along-it'lldinal direction, and a die mounted for translatory movement and cooperating with the base plate in stamping articles from the sheet material, the die causing the base late to shift in the direction of travel of t e sheet material while the die is in contact therewith.

7. In combinations support, a horizontally disposed longitudinally shiftable base late mounted thereon, means normally urgi'ao mg the base plate in one direction, and a die movable in a translatory path and (10- f :operating with the base 'plate in stamping articles from the sheet material, the die causrollers, and a translatory movable die above the base pate and cooperating therewithv in stamping articles from sheet material moving longitudinally over the base plate, the base plate and die being caused to shift in unison while the die is in contact with the sheet material.

9. In combination a horizontal support, a

plurality of parallel rollers journalled on the support, a longitudinally shiftable base plate supported on the rollers, an endless belt movable over the base plate for conveying sheet material, and a horizontally and vertically movable die cooperating with the base plate in stamping articles from the sheet material as it is conveyed over the base plate.

10. In combination a horizontal support, a plurality of parallel rollers'journalled on the support, a longitudinally shiftable base plate supported on the rollers, an endless belt movable over the base plate for conveying sheet material, a horizontally and vertically movable die cooperating with the the base plate in stamping articles from the sheet material as it is conveyed over the base plate, and means for returning the base plate to normal position subsequent to each stamping operation.

11. In combination a horizontal support, a plurality of parallel rollers journalled on the support, a longitudinally shiftable base plate supported on the rollers, an endless of each train being operatively connected with a power source, and a die eccentrically connected with certain of the gears of each train whereby it is continuously raised and lowered to stamp articles from the sheet material.

13. In a stamping machine, a base, a conveyor belt movable over the base for conveying sheet material, a die supported above the base plate for translatory motion, a source of power for the endless belt, a counter shaft driven from such power source and operatively connected with the die, and a slip clutch on the counter shaft whereby to permit ,the endless belt and die to move at the same speed while the die is in contact with the sheet material.

14. In a stamping machine, a longitudinally shiitable base plate, an endless belt movable over the base plate for conveying sheet material, a die cooperating with the base plate in stamping articles from the sheet material and movable in a translatory path, gearing for imparting motion to the die, drive means for the belt and gearing, and means automatically operable to cause the belt and die to move at the same speed while the die is in contact with the sheetmaterial.

15. In a stamping machine, a longitudinally shiftable base plate, a conveyor belt movable over the base plate for carrying sheet material, a die mounted above the base plate for translatory movement and cooperating with the latter in stamping objects from the sheet material, a common drive for the belt and die and automatically operable means for causing the. die and conveyor belt to move at the same speed while the die is in contact with the belt.

16. In a machine of the character described, a horizontall supported base plate, an endless belt movable over the base plate for carrying sheet material, rotatable elements su ported above the base plate, a die connecte to the rotatable elements for translatory motion and cooperating with the base plate in stamping articles from the sheet material, a source of power for driving the belt, a counter shaft driven from such power source, a drive element normally rotatable with the counter shaft and operatively en-' gaging the rotatable elements to transmit motion to the die butpermitted to move relative to the counter shaft as the die approaches the base plate so that the die and endless belt will move at the same speed while the die contacts with the sheet material.

17 In combination a horizontally disposed base plate, a conveyor movable over the base plate for carrying sheet material, a drive shaft operatively connected with the conveyor, gearing supported above the base plate, a die supported from the gearing to move inva translatory path and cooperating with the base plate in stamping articles from the sheet material, a counter shaft cared to the gearing and driven from the drive shaft, and means on the counter shaft for permitting the latter to attain the same speed as the gearing when the die approaches the base plate whereby to cause such die and endless belt to move in synchronism.

18. In a stamping machine, a table, a belt movable thereoverto advance sheet material longitudinally of the table, a translatory die above the table and cooperatin therewith in stamping articles from the s eet material, drive means for the belt and die, and a driven element interposed between the drive means and die and capable'of rotation relative to the drive means so that the die can move with the sheet material when in contact therewith.

19. In astam ing machine, a table, a conveyor belt move. 1e thereover for advancing l which the die is o sheet material in a longitudinal direction, a translatory die above the table, gearing to ratively connected, drive means for the be t, a counter shaft driven from the drive means, and a drive element normally rotatable with the counter shaft and engaging the gearing but permitted to rotate at the same speed as the drive means regardless of the speed of the gearing.

20. In a stamping machine, a table, a coilveyor belt movable thereover for advancing sheet material in a longitudinal direction, a translatory die abovethe table, gearing to which the die is operatively connected, drive means for the belt, a counter shaft geared to the gearing, and an operative connection be-- tween the drive means and counter shaft whereby the operative connection may rotate to rotate therewith but permitting the counter shaft and drive element to be rotated independently whereby the advancement of the sheet material and stamping operation will be synchronized;

22. In a stamping machine, a table, a con veyor belt movable thereover for advancing sheet material in a longitudinal direction, a translatory die above the table, gearing to which the die isoperatively connected, drive means for the belt, a counter shaft geared to the gearing, a driven element loose on the counter shaft and driven from the belt drive means, and friction disks keyed to the counter and driven element to rotate independently atpredetermined times;

shaft and frictionally engaging the driven element whereby to permit thecounter shaft V 23. In a stamping machine, a table, a con veyor belt movable thereover for advancing sheet material in .a longitudinal direction, a verticall movable die above the table, gearing to w ich the die is operatively'connected,

drive means forthe belt, a counter shaft 24. In combination, atable, an endles belt movable over the tableto advance sheet I atemovable over the table to advance sheet mate-' rial in a longitudinal direction, a die operating above the table to stamp articles from the sheet material and movable in planes parallel and at right angles to the path of movement of the sheet material, and means normally urging the die in a vertical direction. 26. In combination, a table, an endless belt movable over the table to advance sheetmaterial in a longitudinal direction, a die operating above the tableto stamp articles from the sheet material and movable in planes parallel and at right angles to the path of movement of the sheet material, and a counter .balancing weight arranged to urge the die in an upward direction.

27. In combination, a t'able,@an endless belt movable over the table to advance sheet material in a longitudinal direction, and a die operating above the table to stamp articles from v the sheet material and movable in planes parallel and at right angles to the path of movement of the sheet, material, a

rotatable element supported above the die' and having operative connection therewith, and means associate Y with the rotatable element normally urgin the same in a direction to exert a lifting action on the die.

28. In combination, a table, an endless belt movable over the table to advance sheet mate-.

rial in a longitudinal direction, a die operating above the table to stamp articles from the sheet material and movable in planes parallel and atright angles to the path of movement of the sheet material, a shaft sup- .ported above the die and extending transversely of the table, a flexible element operatively connected with the shaft and die, a second flexible element connectedwith the shaft, and a weight suspended from such flexible element and normally urging the shaft in a direction to exert a lifting action on the die.

29. In a stampingfmachine, atable over which sheet material is fed in a longitudinal direction, a die above the table and movable in planes parallel to the path of movement vof the sheet material and at right angles thereto, and a base plate cooperating with the die in stampin articles from the sheet "material and mova 1e with the die while engaged with the sheet material. V

30. In a'stamping machine, a table over whichlsheet material is fed in a longitudinal dlrection, a die above the table and movable in planes parallel to. the path of movement of the sheet material and at right angles thereto, a base plate cooperating with'thedie and movable with'the die while engaged with the sheet material, and means for returning the base plate to normal position after the die moves away from the sheet material. 5, 31. In a stamping machine, a table over which sheet material is advanced, rotatable elements disposed upon opposite sides of the table, a die above the table, trunnions carried by the die at opposite sides thereof and eccentrically connected with the die whereby the latter will be continuously actuated in a translatory path, and means normally exert-V ing an upward lift on the die. 32. In a stamping machine, a table over which sheet material is advanced, rotatable elements disposed uponopposite sides of the table, a die above the table, trunnions carried by the die at opposite sides thereof and eccentrically connected with the die whereby the latter will be continuously actuated in a translatory path, and a base plate supported on the table and cooperating with the die in stamping articles from the sheet material.

33. In a stamping machine, a table over which sheet material is advanced, rotatable elements disposed upon opposite sides of the table, a die above the table, trunnions carried by the die at opposite sides thereof and eccentrically connected with the die whereby the latter will be continuously actuated in a translatory path, abase plate supported on the table and cooperating with the die in stamping articles from the sheet material, and resilient means operatively connected with the base plate and urging the same in a direction opposite the path of movement of the sheet material.

Signed at Akron, in the county of Summit and State of Ohio, this 23rd day of Feb- 4 ruary, A. D. 1928.-

ELNO H. TRUMP. 

